Cinder precipitator



June 9, 1925. 1,541,337

E. FElX CINDER PRECIP ITATOR Filed Oct. 18, 1924 ENVENTOR Emaf W dam/ATTORNEY Patented June 9, 1925.

UNITED STATES PATENT OFFICE.

ERNST FEIX, OF TACOMA, WASHINGTON.

CINDER PREGIPITATOR.

Application filed. October 18, 1924. Serial Iva 744,460.

Washington, have invented certain useful Improvements in CinderPrecipitators, of which the following is a specification.

My invention relates to improvements in cinder precipitators and theobject of my invention is to provide a centrifugal cinder precipitatorof simple and substantial construction that is unusually eflicient inoperation and in which the back pressure against the smoke laden airwhich is drawn by mechanical means, such as a fan, from the fire anddischarge into the cinder precipitator for the purpose of clearing theair from the cinders and heavy smoke beforedischarging into theatmosphere is reduced to an absolute minimum thereby resulting in asaving of power.

A further object is to provide a cinder precipitator having a centrallyarranged air discharge passageway and having at the bottom of said airdischarge passageway a plurality of radially disposed vanes arranged tocatch the air and direct the same out through the air dischargepassageway with the least possible agitation of the air and with theleast possible back pressure against the fan that drives such air, saidvanes having outer edges that are inclined to conform substantially tothe line or cone which marks the division between the air that is ladenwith solid. matter and the cleaner air.

Further objects are to provide an inclined or conical plate forming asupport at the bottom of the deflectors and arranged so that solidmatter will not lodge thereon andto provide means for catching anddischarging the moisture that enters the precipitator through thecentrally arranged air discharge passageway. I V Other and more specificobjects will be apparent from the following description taken inconnection with the accompanying drawings. 7

Precipitators of this nature are necessarily required to handle a largevolume of'air or gas at comparatively high speed in the smallestpossible space and must be capable of removing practically all cinderssootand solid matter and of dissi ating' or breaking up the smoke sothat it Will not be objectiom able in congested districts. The foul airor by-products of combustion are usually driven to these precipitatorsby a fan and it is well known that the efficiency of a fan decreasesvery rapidly as back pressure against said fan or against the column ofair that is driven by the fan is increased. For this reason it becomes aproblem of great importance in the construction of precipitators of thisnature to keep back pressure within the precipitator and against the fandown to a minimum. In the design of this invention every possibleprecaution has been taken to reduce'back pressure to an absoluteminimum.

In the drawings Figure 1 is a view in vertical mid section of a cinderprecipitator constructed in accordance with my invention.

Fig. 2 is a view in cross section of the same substantially on brokenline 22 of Fig. 1. i

Referring to the drawings, throughout which like reference numeralsdesignate like parts, I show a cinder precipitator comprising acylindrical section or drum 5 having a conical bottom end 6 terminatingin a relatively small outlet 7 for solid matter.

The cylindrical section 5 is provided with a relatively flatfrustro-conical shaped top wall that supports a relatively large axiallyarranged air discharge pipe or conduit 10 that extends downwardly intothe cylindrical drum 5 slightly more than half the distance from the topto the bottom of said drum and is open at both the top and bottom ends.

A plurality of supports 11, preferably angle bars, are secured to theinside of the air dischargepipe 10 and extend downwardly therefrom and aplurality of radially disposed vanes 12 are secured to said supports 11and project outwardly below the end of the discharge pipe, an open areasubstantially as large as pipe 10 being left in the center of the vanes.The upper edge 13 of each vane 12 is inclined downwardly from the innerto the outer side and the bottom edge 14 of each vane is similarlyinclined. downwardly. An annular plate 15 is secured to the bottom ofvanes 12 and forms a frustroconically shaped bottom having a centrallyarranged openifigjle' of substantially the same diameter. as the airoutlet pi e 10 said bottom 15 being pitched at a sufficientangle so thatany solid matter that settles thereon will slide off. I find that if thebottom 15 is fiat or has only a slight angle cinders may collect thereonand be carried out through air discharge pipe 10. The bottom 15 bracesandsupportsthevanes and helps to guide and direct the air into dischar econduit 10 and tends'to' pre vent the discharging air from sweeping downinto the conical bottom portion 6 thereby preventing eddieswhichmight'otl'ierwise produce back pressure against the incoming air.

The outer edges of the vanes 12 are 111- clined outwardly fron'r top tobottom as at 16 the angle of said edges 16' being substantially the sameas the angle of separa tion between the cinder laden air and the clearair as indicated at 17 and the object of thus inclining the edges of thevanes-12 being to extend the vanes as close-as'possible to the strata ofcinder laden air ith out actually disturbing the cinders or solid matteror producing eddies that will dis-' to operate the same.-

It will c noted that the vanes 12 and bottom plate 15 are entirelywithin the drum 5 and above the bottom plane of said drum as representedby the line 18 and do not extend down into the conical portion 5 wherethey would restrict the area through which the descending solid matterpasses, and, as I have found, decrease the efliciency of a precipitatoror necessitate the provision of a larger precipitator to perform thesame work.

I also-find that it is desirable although notnecessary, to preventmoisture that enters through conduit 10 from falling on the walls ofconical bottom portion 6, and causing the solid matter to adherethereto. To accomplish this I provide a drip pan 20 adjustably suspendedbelow the bottom 15 by supports 21 and having an outlet pipe 22 throughwhich moisture =may discharge. The pro vision of this pan eliminates thenecessity of using a hood over conduit 10 or using any device that willchange the course of the discl'iarging air, all of which devices I findwill increase back pressure within conduit- 10 and drum 5.

Pan 20 is adjustably supported because it is found that said pan must beadjusted or set for eachprecipitator to insure maximum efiici'ency forthe. conditions under which that precipitator is to operate. Ordinarilyno further adjustment will be necessary unless the conditions. underwhich the precipitator operates are changed. Obviously the moisturereceptacle may be dispensed with if conditions do not require the same.

' An outlet conduit 24: for air or gas laden with solid matter ascinders, soot and smoke is arranged to deliver tangentially into theupper peripheral portion of the drum it being understood-that the sameis connected with. means not shown, as with a fan or blower by which avelocity may be imparted to the air or as.

trifugal force toward the circumference of drum 5 and will, I findforu'i a coneof'separation of the solid matter from the cleaner air orgas substantially as indicated by the line 1'? in Fig. l. The particlesof solidvmat= t r collecting in the peripherale-portion of the drum 5and cone 6 slide down the sides of cone 6 and pass out through dischargevent 7 while the cleaner air passing inwardlythrough vanes 12 finds an.unobstructed opening thi-ougl'i conduit 10 and discharges freely withthe least possible amount of back pressure against the incoming: air andagainst the fan that drives such air.

The separation begins the instant the air; or gas enters the drum 5 andthe air should practically all discharge before it has passed more thanones around the drum 5.

The foregoing description and accompany:

iiig drawings clearly disclose a preferred embodiment of myinvention butit will be understood that changes in this device may be'inade withinthe scope and spirit of the following claims.

I claim: I

'1. In a device of the classdescribed, a drum having a conical bottomportion, tangential airinlet means connected with said drum,- acentrallyarranged air discharge conduit open at both ends and extendingdownwardly into said drum from the top end,-and radial vanes projectingoutwardly beyond'said air inlet conduit below the bottom end thereof,the outer edges of said: vanes beinginclined outwardly from'top tobottomrelative to'the axis of the drum.

2. In a device of the class described, a

drum having a conical bottom portion, tangential air inlet meansconnected with said drum,- a centrally arranged air discharge conduitopen at both ends anda extending downwardly into said drum from the topend, and radial vanes projecting outwardly beyond said air inlet conduitbelow the bottom end thereof, the top and bottom edges of said vanesbeingninclined downwardly from inside to outside and the outeredges ofsaid vanes being inclined outwardly from the top to the bottom.:

3. In a device of the class described, a drum having a conical bottomportion, tangential air inlet means connected with said drum, acentrally arranged air discharge conduit open at both ends and extendingdownwardly into said drum from the top end and radial vanes projectingoutwardly beyond said air inlet conduit below the bottom end thereof,the outer edges of said vanes being inclined outwardly from the top tothe bottom on an angle that corresponds substantially to the line ofseparation of the solid matter from the air in said drum.

at. In a device of the class described, a drum, a conical extension onthe bottom end of said drum, tangential air inlet means at the upper endof said drum, a relatively large air outlet conduit open at both endsand extending downward centrally into said drum, and a plurality ofradial vanes supported below the lower end of said air outlet conduitand projecting outwardly therefrom, the bottom edges of said vanes beinginclined downwardly from the center outwardly and an annular conicalbottom plate secured to the bottom edges of said vanes said bottom platehaving an open center.

5. In a device of the class described, a drum, a conical extension onthe bottom end of said drum, tangential air inlet means at the upper endof said drum, a relatively large air outlet conduit openv at both endsand extending downward centrally into said drum, a plurality of radialvanes supported below the lower end of said air outlet conduit andprojecting outwardly therefrom, and a shallow circular receptaclesupported below said vanes to catch moisture that en ters through saidair discharge conduit.

6. In a device of the class described, a drum, a conical extension onthe bottom end of said drum, tangential air inlet means at the upper endof said drum, a relatively large air outlet conduit open at both endsand extending downward centrally into said drum, a pluarlity of radialvanes supported below the lower ends of said air outlet conduit andprojecting outwardly therefrom, the bottom edges of said vanes beinginclined downwardly from the center outwardly, an annular conical bottomplate secured to the bottom edges of said vanes said bottom plate havingan open center and a shallow circular receptacle supported below saidvanes to catch moisture that enters through said air discharge conduit.

The foregoing specification signed at Tacoma, WVashington, this 8th dayof October,

ERNST FEIX.

